﻿/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace com.google.zxing.oned
{
    using System;
    using System.Text;
    using com.google.zxing.common;

    public sealed class EAN8Reader : AbstractUPCEANReader 
    {
          private int[] decodeMiddleCounters;
          public EAN8Reader() {
            decodeMiddleCounters = new int[4];
          }

          protected override int decodeMiddle(BitArray row, int[] startRange, StringBuilder result) {
            int[] counters = decodeMiddleCounters;
            counters[0] = 0;
            counters[1] = 0;
            counters[2] = 0;
            counters[3] = 0;
            int end = row.getSize();
            int rowOffset = startRange[1];

            for (int x = 0; x < 4 && rowOffset < end; x++) {
              int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS);
              result.Append((char) ('0' + bestMatch));
              for (int i = 0; i < counters.Length; i++) {
                rowOffset += counters[i];
              }
            }

            int[] middleRange = findGuardPattern(row, rowOffset, true, MIDDLE_PATTERN);
            rowOffset = middleRange[1];

            for (int x = 0; x < 4 && rowOffset < end; x++) {
              int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS);
              result.Append((char) ('0' + bestMatch));
              for (int i = 0; i < counters.Length; i++) {
                rowOffset += counters[i];
              }
            }

            return rowOffset;
          }

          public override BarcodeFormat getBarcodeFormat() {
            return BarcodeFormat.EAN_8;  
          }
            
            }

}